Improvement and Application of Sampling Device for Adsorption and Concentration of Volatile Organic Compounds

VernacularTitle:挥发性有机物吸附浓缩采样装置改进与应用
Author: Xin-Yi GUO ¹ ; Man-Man WU ; Chao MA ; Jia-Xin CHEN ; Da-Jun LIN ; Zhen ZHOU ; Ying-Nan GAO ; Wei GAO
Author Information

1. 暨南大学环境与气候学院,质谱仪器与大气环境研究所,广州 510632
Keywords: Volatile organic compounds; Adsorption concentration; Sampling device
From: Chinese Journal of Analytical Chemistry 2024;52(10):1487-1495,中插14-中插24
CountryChina
Language:Chinese
Abstract: An adsorption and concentration sampling device for volatile organic compounds(VOCs)was designed in this work,which improved the long-term monitoring stability of the online monitoring system for VOC adsorption and concentration,and solved the issue of rapid attenuation of responses toward higher carbon compounds.The designed VOC desorption device achieved an average heating rate of 40 ℃/s,with a relative standard deviation(RSD)of 0.4％.Quantitative analysis of mixture of 116 kinds of different VOC standard gases was performed,and the test results showed that the qualification rate of standard curves increased significantly from 90％to 99％,the proportion of detection limits below 0.1 nmol/mol improved from 85％to 90％,and the proportion of residual levels in the system below 0.1 nmol/mol also increased from 85％to 90％.The stable monitoring period was extended from 20 d to over 30 d,making it more conducive to long-term unattended monitoring by the developed instrument.